Recall that almost to a man the Tsarist police, the Okhrana, joined the Bolsheviks. Police work is a frame of mind.
Give me a break. We've all read about FBI agent Turdzok's "frame of mind" ('STOP TRUMP!!!'), which is obviously not something shared by all LEOs, particularly the officers who wear MAGA hats (and vote Republican ;^) when they're off duty...